EP0509101A1 - Elektrostatische beschichtungsvorrichtung - Google Patents

Elektrostatische beschichtungsvorrichtung Download PDF

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Publication number
EP0509101A1
EP0509101A1 EP91909139A EP91909139A EP0509101A1 EP 0509101 A1 EP0509101 A1 EP 0509101A1 EP 91909139 A EP91909139 A EP 91909139A EP 91909139 A EP91909139 A EP 91909139A EP 0509101 A1 EP0509101 A1 EP 0509101A1
Authority
EP
European Patent Office
Prior art keywords
rotary atomizer
atomizer head
paint
external electrodes
high voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP91909139A
Other languages
English (en)
French (fr)
Other versions
EP0509101A4 (en
Inventor
Shinichi 699-12 Yahata Takayama
Yoshihisa Room 402 Hayashi Bldg. Tsuboi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Ransburg KK
Original Assignee
ABB Ransburg KK
Ransburg Automotive KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Ransburg KK, Ransburg Automotive KK filed Critical ABB Ransburg KK
Publication of EP0509101A1 publication Critical patent/EP0509101A1/de
Publication of EP0509101A4 publication Critical patent/EP0509101A4/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member

Definitions

  • This invention relates to an electrostatic spray coating machine with a rotary atomizer head, and more particularly to an electrostatic spray coating machine suitable for spraying aqueous and metallic type paints.
  • the paints designed for electrostatic spray coating are classified into a solvent type paint (an oil paint) which has a relatively large electric resistance, an aqueous type paint (a water paint) which has a relatively small electric resistance, and a metallic type paint with a dispersed metal powder content has a relatively small electric resistance similarly to the aqueous paint. Since the electric resistance of the paint varies depending upon the type or nature of the paint in this manner, it is the usual practice to apply high voltage by a different method for a different type of paint.
  • the component parts such as paint tank and color changing valve are connected to the earth in operation from the standpoint of preventing danger.
  • the electrostatic spray coating machine for the solvent type paint is generally arranged to apply a high voltage directly to a rotary atomizer head for direct charging of paint particles.
  • FIGs. 6 to 9 Illustrated in Figs. 6 to 9 is an electrostatic coating machine of a prior art construction employing the indirect charging system for the aqueous paint.
  • a coating machine of the rotary atomizer head type which is largely constituted by a cylindrical housing 2 formed of a synthetic resin material (e.g., polytetrafluoroethylene), an air motor 3 mounted within the housing 2 and internally provided with an air bearing (not shown), a rotational shaft 4 rotationally driven from the air motor 3, a rotary atomizer head 5 mounted on the rotational shaft 4 on the front side of the housing 2, and a paint feed tube 6 in the form of a metal pipe passed through the rotational shaft 4 to supply paint to the rotary atomizer head 5.
  • An insulate support 7 is projected on the rear side of the housing 2, the insulate support 7 being mounted on a reciprocator or the like.
  • the basic construction of the air motor 3 is known from Applicant's prior application, Laid-Open Japanese Utility Model Application 60-13259, and therefore its detailed description is omitted here.
  • the reference numeral 8 denotes an annular electrode-mounting bracket which is located radially on the outer side of the circumference of the housing 2 and radially outward of the rotary atomizer head.
  • the bracket 8 is supported on the rear end of the housing 2 through support arms 8A.
  • Indicated at 9 are supporters which are formed of a plastic material (e.g., polytetrafluoroethylene) to serve as electrode retainer rods which cover external electrodes 10 as will be described later.
  • Each supporter 9 is provided with a recess 9A at its fore end, and six of this sort of supporters 9 are provided in equidistant positions around the circumference of the electrode brackets 8. As shown in Fig.
  • the external electrodes 10 are axially fitted and retained in the respective supporters 9, in such a way that the fore end 10A of each external electrode 10 is protruded out of the recess into a position flush with the fore end face of the supporter 9. Further, the fore end 10A of each external electrode 10 is located slightly rearward and radially outward of the rotary atomizer head 5.
  • Designated at 11 is a paint supply source, which is constituted by a motor 12, a paint pump 13, a paint tank 14 and so forth, storing an aqueous paint in the paint tank 14.
  • the paint supply source 11 as a whole is connected to the earth 15.
  • Indicated at 16 is an pneumatically driven three-way change-over valve which is mounted on the insulate support 7, the inlet port of the three-way change-over valve 16 being connected to the paint pump 13 through a paint feed conduit 17 while the outlet port of the valve is connected to the feed tube 6 through a spiral hose 18 covered with a synthetic resin material. Further, the return port of the valve is opened into the paint tank 14 through a return conduit 19.
  • the three-way change-over valve 16 normally communicates the paint feed conduit 17 with the return conduit 19 to relief the paint, and, when switched to an operating position, communicates the paint feed conduit 17 with the spiral hose 18 to supply the paint to the rotary atomizer head 5.
  • the reference 20 denotes a high voltage generator which is constituted, for example, by a Cockcroft circuit or the like, and electrically connected to the external electrodes 10 through a high voltage cable 21 to apply thereto a high voltage of -50 ⁇ -90 kV.
  • a high voltage generator which is constituted, for example, by a Cockcroft circuit or the like, and electrically connected to the external electrodes 10 through a high voltage cable 21 to apply thereto a high voltage of -50 ⁇ -90 kV.
  • the fore end of the high voltage cable 21 is connected to the electrode bracket 8.
  • the air motor 3 of the coating machine 1 is put in high speed rotation to drive the rotational shaft 4 and the rotary atomizer head 5 at a speed of 40,000 ⁇ 60,000 rpm.
  • a high voltage is applied to the respective external electrodes 10 from the high voltage generator 20 through the cable 21 thereby forming a corona discharge region forward of the fore end 10A of the external electrodes 10.
  • the paint supply source 11 is actuated, but the aqueous paint is relieved through the three-way change-over valve 16.
  • the aqueous paint in the tank 14 is fed to the rotary atomizer head 5 through the paint pump 13, paint feed conduit 17, three-way change-over valve 16, spiral hose 18 and feed tube 6.
  • the paint is atomized by the rotary atomizer head 5 into micro particles, which are charged as they are passed through the corona region and caused to fly along the electrostatic field between the external electrodes 10 and the workpiece 22 for deposition on the latter.
  • an aqueous paint is atomized by the high speed rotation of the rotary atomizer head 5 and sprayed in radial directions under the influence of centrifugal force.
  • the aqueous paint which uses water as a dispersant or diluent, the water content in the sprayed paint evaporates to increase the water density in the space between the rotary atomizer head 5 and the external electrodes 10.
  • the maximum voltage VMAX which can be applied to the external electrodes 10 free of the discharge phenomenon is predetermined to be in the range of -54 ⁇ -57 kV, limiting the efficiency of paint deposition on the workpiece 22 to about 70 ⁇ 80%.
  • the deposition efficiency can be enhanced by increasing the voltage to be applied to the respective external electrodes 10.
  • the prior art has a problem in that, not to mention the improvement in paint deposition efficiency, the paint deposition is rendered infeasible by the discharge phenomenon which takes place between the rotary atomizer head 5 and external electrodes 10, when a voltage in excess of the above-mentioned maximum voltage VMAX is applied to the external electrodes 10.
  • the distance H of the external electrodes 10 it may be conceivable to increase the distance H of the external electrodes 10 from the rotary atomizer head 5.
  • the maximum voltage VMAX can be increased, there will arise another problem that the number of the external electrodes 10 has to be increased because six external electrodes are not sufficient to make up for the reduction in density of the paint particles to be charged in the corona discharge region formed forward of the respective external electrodes 10.
  • a further increase of the distance H will result in a lower velocity of the sprayed paint particles in the corona discharge regions, the sprayed paint particles being influenced by the static attractive force to a greater degree correspondingly to the reduction in velocity of the sprayed paint particles and attracted toward the external electrodes 10. Consequently, the external electrodes 10 are contaminated by paint deposition. Therefore, the external electrodes 10 should be located in positions where the distribution density and velocity of the sprayed paint particles are high enough to permit effective charging by a minimum number of electrodes.
  • the initial velocity F of the sprayed paint from the rotary atomizer head and the static attractive force f in the corona discharge region are in the relationship of it is advantageous to locate the respective external electrodes 10 at a distance H within a range which satisfies Equation (1) above, in order to charge the paint particles effectively by the use of a minimum number of external electrodes. Accordingly, even if the maximum voltage VMAX could be elevated, the method of simply locating the respective external electrodes 10 at a greater distance from the rotary atomizer head 5 is not the best way of enhancing the deposition efficiency.
  • the present invention has as its object the provision of an electrostatic coating machine with an external electrode system, which permits to elevate the high voltage to be applied to the external electrodes for enhancing the paint deposition efficiency without giving rise to the discharge phenomenon even in case of an aqueous or metallic paint.
  • the present invention employs a construction which is characterized by the provision of electrode retainer rods each being formed with an oblique surface at the fore end thereof to have a greater length on the inner side facing toward a rotary atomizer head and a shorter length on the outer side.
  • each external electrode when seen from the rotary atomizer head, each external electrode is concealed behind a projected end of the oblique surface of the electrode retainer rod in such a manner as to increase the apparent distance between the external electrode and the rotary atomizer head, permitting to elevate the high voltage to be applied to the external electrodes for attaining a higher paint deposition efficiency while suppressing occurrence of the discharge phenomenon.
  • FIGs. 1 and 2 there is shown a first embodiment of the invention.
  • each supporter 31 being formed of an insulating synthetic resin material (e.g., polytetrafluoroethylene) and, similarly to the afore-mentioned prior art supporter 9, mounted on an annular bracket 8 in a position slightly rearward and radially outward of the rotary atomizer head 5.
  • the fore end face of each supporter 31 is formed in an outwardly inclined oblique face 31A defining a concealing projection 31B on the inner side toward its distal end.
  • each supporter 31 which forwardly terminates in the oblique end face 31A has a greater length on the inner side with the concealing projection 31B in face to face relation with the rotary atomizer head 5 and a shorter length on the outer side away from the rotary atomizer head 5.
  • each external electrode 32 is electrically connected to a high voltage generator 20 through a high voltage cable 21.
  • each supporter 31 is formed into an oblique surface 31A which contributes to prolong the distance H' between the external electrode 32 and the rotary atomizer head 5 by a length corresponding to the concealing projection 31B, as compared with the prior art counterpart, lowering the value of current flowing across the distance H' for suppression of the discharge phenomenon.
  • the breadth of the corona region which is formed at the fore end 32A of each external electrode 32 is almost same as in the prior art counterpart, permitting to charge aqueous paint particles and to increase the current value between each external electrode and the workpiece 22.
  • the concealing projection 31B which is in the form of a sharp edge can maintain laminar flows without blocking the air streams produced by the rotary atomizer head 5.
  • the respective external electrodes 10 are provided within a range which satisfies Equation (1) and, despite the respective external electrodes 10 are located in positions similar to those of the external electrodes 10 of the prior art, it becomes possible to increase the maximum value VMAX of the high voltage to be applied to the respective external electrodes 32 to about 120% (-65 ⁇ -70 kV) of the value in the prior art counterpart, enhancing the deposition efficiency by 5 ⁇ 10%.
  • a second embodiment of the invention a feature of which resides in that an oblique surface is provided only on half of the fore end face of the electrode retainer rod.
  • the component parts common with the above-described first embodiment are also designated by common reference numerals, and their descriptions are omitted to avoid repetitions.
  • the reference 41 denotes a supporter which serves as one of the electrode retainer rods in this embodiment.
  • the supporter 41 is formed of an insulating synthetic resin material (e.g., polytetrafuluoroethylene), and, similarly to the supporter 31 in the above-described first embodiment, mounted on an annular bracket 8 in a position slightly rearward and radially outward of the rotary atomizer head 5.
  • the supporter 41 is provided with an oblique surface 41A only on half of its fore end face on the inner side of its center axis or on the side of the rotary atomizer head 5, the oblique surface 41A forming a concealing projection 41B toward its fore end on the inner peripheral side.
  • a flat surface 41C is provided on the outer side away from the rotary atomizer head 5.
  • Denoted at 42 is an external electrode which is axially embedded in the supporter 41.
  • the fore end 42A of the external electrode 42 is slightly protruded from the center of the supporter 41 to such a degree that the fore end portion 42B is hidden behind the concealing projection 41B and directly invisible from the rotary atomizer 5.
  • the external electrode 42 is electrically connected to a high voltage generator 20 through a high voltage cable 21.
  • the electrostatic spray coating machine of this arrangement has the same operational effects as the above-described first embodiment.
  • the distance H' can be maintained between the rotary atomizer head 5 and each external electrode 42, thereby permitting to increase the value of the maximum voltage VMAX to be applied to the external electrodes 42 for enhancement of the deposition efficiency in the same manner as in the first embodiment.
  • a third embodiment of the invention a feature of which resides in that the respective electrode supporters are mounted in position by means of a plural number of electrode support arms which are fixed on the rear end of the housing, in place of the annular bracket of the first embodiment.
  • the component parts common with the above-mentioned prior art counterpart are designated by common reference numerals and their descriptions are omitted to avoid repetitions.
  • the reference 51 indicates another embodiment of the rotary atomizer head type coating machine, which is largely constituted by a housing 52 forming a main body of the spray coating machine 51 as will be described later, a rotary atomizer head 5 projected from a shaping ring 52C of the housing 52 and mounted on an air motor 3 in the housing 52 for rotation in synchronism with a rotational shaft 4, and a paint feed tube (not shown) in the form of a metal tube passed through the rotational shaft 4 to supply paint to the rotary atomizer head 5.
  • this embodiment differs from the foregoing embodiments in that six supporters 54 are located in uniformly spaced positions around the outer periphery of the housing 52 as electrode retainer rods, and six L-shaped arms 53 which will be described later are fixed around the rear end of the housing as electrode support arms for mounting the supporters 54.
  • Designated at 52 is a housing of the spray coating machine 51, which is formed into a stepped cylindrical shape by the use of an insulating synthetic resin material (e.g., polytetrafluoroethylene), and which is largely composed of a fore cylindrical body 52A, a rear cylindrical body 52B provided behind and formed in a larger diameter than the fore cylindrical body 52A, and a shaping ring 52C provided on the front side of the fore cylindrical body 52A.
  • the rear cylindrical body 52B is provided with six connection holes 52B1 in uniformly spaced positions around and on its circumferential surface for mounting L-shaped arms 53 (only one arm is shown in the drawing), which will be described later, along with connection holes (not shown) for mounting high voltage connection members 56 which will also be described hereinlater.
  • Each L-shaped arm 53 is extended toward the fore end of the housing 52 axially in parallel relation therewith, and provided with a cylindrically shaped retainer portion 53A for holding thereon a supporter 54 which will be described later, and a rectangular base portion 53B fixed on the rear body 52B of the housing 52 in the radial direction.
  • the fixed base portion 53B is secured to the rear body 52B of the housing 52 by screws 53C.
  • the retainer portion 53A has a receptacle hole 53B axially bored in its fore end portion to fit the supporter 54 therein.
  • the reference 54 indicates supporters which are formed of an insulating synthetic resin material and which are employed in the present embodiment as electrode retainer rods to be fitted in the receptacle holes 53D in the L-shaped arms 53.
  • each one of the supporters 54 is provided with an outwardly inclined oblique surface 54A on its fore end face to form a concealing projection 54B toward the fore end of the supporter 54 on the inner side thereof.
  • the supporter 54 has a greater length on its inner side with the concealing projection 54B in face to face relation with the rotary atomizer head 5, and a shorter length on its outer side away from the rotary atomizer head 5, when viewed from the latter.
  • Designated at 55 are external electrodes which are axially embedded and retained in the respective supporters 54, tip end 55A of each external electrode 55 being slightly protruded out of the oblique surface of the supporter 54 in such a degree that the tip end 55A of the electrode 55 is directly invisible from the rotary atomizer head 5 and hidden behind the concealing projection 54B of the oblique surface 54A of the supporter 54.
  • a corona discharge region is formed forward of the tip end 55A of each external electrode 55 upon applying a high voltage thereto.
  • the high voltage coupling portion 56 is formed of a synthetic resin material in a rectangular shape having at one side thereof a fixing portion 56A and at the other side a receptacle hole (not shown) to receive therein a connector 57 at the fore end of the high voltage cable 21, which is located on a side wall away from the front side of the housing 52.
  • the fixing portion 56A is secured to the rear body 52B of the housing 52 by screws 56C.
  • the reference 58 denotes an annular metal wire which is embedded in the rear body 52B of the housing 52, the annular metal wire 58 being formed in a circular shape larger in diameter than the front body 52A but smaller than the rear body 52B of the housing 52.
  • the annular metal wire 58 is positioned in engagement with the respective connecting holes 52B1 which are formed in the rear body 52B.
  • each metal wire 59 is connected to the annular metal wire 58 through a connector member 60 including a contact plate and a spring formed of a conductive metal material, while the other end is connected to the external electrode 55 in the corresponding supporter 54 through a connector member 61.
  • the high voltage which is supplied to the spray coating machine 51 from the high voltage generator 20 through the cable 21 is fed to the annular metal wire 58 in the housing 52 through the connector 57 and high voltage coupler 56, and from the annular conductor wire 58 to the metal wires 59 in the respective L-shaped arms 53 through the connector members 60 and then to the respective external electrodes 55 through the connector members 61. Consequently, the high voltage from the high voltage generator 20 is applied to the respective external electrodes 55 through the high voltage cable 21, forming a corona discharge region forward of the tip end 55A of each external electrode 55.
  • the electrostatic spray coating machine of this construction has the same operational effects as the first embodiment described above.
  • the supporters 54 each having the outwardly inclined oblique surface 54A on the fore end face thereof, are employed as electrode retainer rods to be mounted on the L-shaped arms 53.
  • these supporters may be replaced by the supporters 41 as in the second embodiment in which each supporter 41 is provided with an oblique surface 41A only on one side of its center axis, that is, on the inner side which confronts the rotary atomizer head 5, forming a concealing projection 41B toward the fore end of the oblique surface 41A, and a flat surface 41C on the outer side remote from the rotary atomizer head 5.
  • the supporter (electrode retainer rod) according to the invention is not restricted to the shapes of the supporters 31, 41 and 54 of the foregoing embodiments, and may be formed in other shapes as long as it has an oblique surface of an acute angle at its fore end in such a manner as to make the external electrode invisible directly from the rotary atomizer head 5 and to increase the distance H' thereby to securely maintain the corona discharge region formed by the external electrode.
  • the present invention is not restricted to aqueous type paints and can also be suitably applied to metallic paints as well as to solvent type paints.
  • the electrode mounting bracket is not restricted to the shape of the bracket 8 or to the arrangement of the six L-shaped arms 53 shown in the foregoing embodiments, and may take other forms as long as it can hold the supporters 31, 41 or 54 in positions radially outward of the rotary atomizer head 5.
  • the electrostatic spray coating machine employs an electrode retainer rod construction with an oblique surface at the fore end thereof to increase the rod length on the inner side facing toward the rotary atomizer head, as compared with the rod length on the outer side, in such a manner as to conceal the external electrode behind the oblique surface when viewed from the side of the rotary atomizer head, thereby increasing the distance from the rotary atomizer head to the external electrode to reduce the value of current flow from the external electrode to the rotary atomizer head, and consequently permitting to elevate the maximum voltage to be applied to the external electrode for the purpose of attaining a higher deposition efficiency.

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  • Electrostatic Spraying Apparatus (AREA)
EP19910909139 1990-05-18 1991-05-17 Electrostatic coating device Ceased EP0509101A4 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP128702/90 1990-05-18
JP12870290 1990-05-18
JP48907/91 1991-02-21
JP3048907A JP2926071B2 (ja) 1990-05-18 1991-02-21 静電塗装装置

Publications (2)

Publication Number Publication Date
EP0509101A1 true EP0509101A1 (de) 1992-10-21
EP0509101A4 EP0509101A4 (en) 1992-12-02

Family

ID=26389252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910909139 Ceased EP0509101A4 (en) 1990-05-18 1991-05-17 Electrostatic coating device

Country Status (6)

Country Link
US (1) US5163625A (de)
EP (1) EP0509101A4 (de)
JP (1) JP2926071B2 (de)
KR (1) KR930011574B1 (de)
CA (1) CA2053309C (de)
WO (1) WO1991017836A1 (de)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
DE4312262A1 (de) * 1993-04-15 1994-10-20 Gema Volstatic Ag Elektrostatische Sprühvorrichtung
WO1999044748A1 (de) * 1998-03-04 1999-09-10 Abb Patent Gmbh Rotationssprühzerstäuber mit hochspannungsquellen
EP1362640A1 (de) * 2002-01-24 2003-11-19 Dürr Systems GmbH Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
EP1475158A1 (de) * 2003-05-08 2004-11-10 Illinois Tool Works Inc. Abgeschirmte Elektrode
US8096264B2 (en) 2007-11-30 2012-01-17 Illinois Tool Works Inc. Repulsion ring
WO2014055432A1 (en) 2012-10-01 2014-04-10 Graco Minnesota, Inc. Spray tip assembly for electrostatic spray gun

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US6105886A (en) * 1995-05-19 2000-08-22 Nordson Corporation Powder spray gun with rotary distributor
DE69717416T2 (de) * 1996-10-01 2003-04-03 Alstom Power Kk Rotationszerstäubungskopf
WO2002026390A1 (en) * 2000-09-29 2002-04-04 Graco Minnesota Inc. Low voltage electrostatic charging
US6708908B2 (en) * 2001-06-29 2004-03-23 Behr Systems, Inc. Paint atomizer bell with ionization ring
WO2005075090A1 (en) * 2004-02-09 2005-08-18 Matsushita Electric Works, Ltd. Electrostatic spraying device
US7823808B2 (en) * 2004-02-09 2010-11-02 Panasonic Electric Works Co., Ltd. Electrostatic spraying device
CN100444967C (zh) * 2004-02-09 2008-12-24 松下电工株式会社 静电喷涂设备
JP4578908B2 (ja) * 2004-09-17 2010-11-10 トヨタ自動車株式会社 静電塗装装置
JP4445830B2 (ja) * 2004-10-14 2010-04-07 ランズバーグ・インダストリー株式会社 静電式散布装置
KR100904009B1 (ko) * 2005-08-01 2009-06-22 에이비비 가부시키가이샤 정전 도장 장치
CN101878070B (zh) 2007-11-30 2012-11-21 Abb株式会社 静电涂装装置
DE102009013979A1 (de) 2009-03-19 2010-09-23 Dürr Systems GmbH Elektrodenanordnung für einen elektrostatischen Zerstäuber
JP5633990B2 (ja) * 2010-06-07 2014-12-03 トヨタ自動車株式会社 静電塗装装置
WO2014112447A1 (ja) * 2013-01-15 2014-07-24 住友化学株式会社 静電噴霧装置、および静電噴霧装置の制御方法
US20150060579A1 (en) * 2013-08-29 2015-03-05 Finishing Brands Holdings Inc. Electrostatic Spray System

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4312262A1 (de) * 1993-04-15 1994-10-20 Gema Volstatic Ag Elektrostatische Sprühvorrichtung
WO1999044748A1 (de) * 1998-03-04 1999-09-10 Abb Patent Gmbh Rotationssprühzerstäuber mit hochspannungsquellen
EP1362640A1 (de) * 2002-01-24 2003-11-19 Dürr Systems GmbH Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
EP1475158A1 (de) * 2003-05-08 2004-11-10 Illinois Tool Works Inc. Abgeschirmte Elektrode
US8096264B2 (en) 2007-11-30 2012-01-17 Illinois Tool Works Inc. Repulsion ring
WO2014055432A1 (en) 2012-10-01 2014-04-10 Graco Minnesota, Inc. Spray tip assembly for electrostatic spray gun
EP2903748A4 (de) * 2012-10-01 2016-07-06 Graco Minnesota Inc Sprühspitzenanordnung für elektrostatische spritzpistole

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CA2053309A1 (en) 1991-11-19
JP2926071B2 (ja) 1999-07-28
EP0509101A4 (en) 1992-12-02
JPH04215864A (ja) 1992-08-06
CA2053309C (en) 1995-12-05
WO1991017836A1 (en) 1991-11-28
KR930011574B1 (ko) 1993-12-13
KR920700777A (ko) 1992-08-10
US5163625A (en) 1992-11-17

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